Family name Willauer (Willauer 
) , around the world, is a rare cognomen. The cognomen Willauer is habitual in Western Europe, particularly Switzerland, where it is a rare surname, Germany, and France. Not in comparison with a country's population, it is the most numerous in the United States, Germany, and France.
| VARIANT | COUNTRY |
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| Willauer | Germany, Switzerland, United States, Canada, France |
| eliot butler willauer American architect, US (b. 1912) |
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heather willauer American analytical chemist and patents holder, US (b. 1974) |
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| aurélien r willauer researcher |
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| alexandra n willauer researcher (ORCID 0000-0003-0968-8115) |
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| dave willauer college basketball player (1962–1962) Michigan State |
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| sandro willauer |
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| lea willauer Swiss association football player, CH (b. 1991) |
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